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Hello friends!

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Welcome to a new Happy Learning video!

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Today we are going to learn about the circulatory system of the human body.

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The main function of the circulatory system is to carry, through the blood, the nutrients

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to the cells of our body.

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It is formed by the heart, arteries and veins, and its proper functioning is essential for

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us to have good health.

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I have a curiosity, do you know how much all of the arteries and veins would measure together

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put in single file?

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They would measure 96,000 km, which would be equivalent to almost two and a half laps

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of the Earth.

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It's incredible, right?

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The heart has the main role in making sure that the blood travels around the body.

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With its 100,000 pulsations per day, it ensures that blood circulates throughout our body,

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allowing it to distribute oxygen and nutrients into our cells.

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We are going to start a journey through the circulatory system, so we can understand it

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much better.

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The journey of blood begins in the heart.

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With the pulsations of the heart, the blood comes out through one of the greatest highways

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of the circulatory system, called the aorta.

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From that moment, blood flows through our body, through many veins.

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During this trip, the blood is delivering oxygen and nutrients to the cells through

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the capillaries.

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It reaches the neck, head and brain through one side.

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From there, the blood continues to flow into our arms, then through the aorta, around the

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thorax and abdomen, and finally reaching both of our legs.

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As this trip is circular, that is to say, it has no end, the blood starts the trip back

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to the heart to regain nutrients and oxygen.

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The blood that returns from the lower part of the body flows through the inferior vena

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cava.

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The one that returns from the arms and head travels through the superior vena cava.

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All that blood reaches the lungs, where it gets oxygenated and returns back to the heart.

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There, the journey starts again.

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The truth is that it is incredible that blood is permanently traveling inside our body,

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don't you think?

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Well, now you know a little bit more about the circulatory system.

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But before saying goodbye, we want to remind you that for our body to work well, we have

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to do a lot of physical exercise and have a balanced diet.

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You have to eat vegetables, fruit and fish, and reduce eating sugar and sweets as much

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as you can.

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And of course, spend less time sitting in front of the TV or the computer.

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So now you all know.

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Right, now everyone, go to run and jump!

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Goodbye friends!

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Oh, and do not forget to subscribe to Happy Learning TV.